12/10/2023 0 Comments Justin 2018 isoscelesFind the value of Cos 30° + Sin 60° (2 marks) Ans. We infer that Cos 400 belongs to the first quadrant, therefore the sign of Cos 400 is positive. The cosine function is negative in the second and third quadrants. x = arccos(−1) x = arccos ( - 1) Simplify the right side. Take the inverse cosine of both sides of the equation to extract x x from inside the cosine.
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